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(No Model.)

H. IVLSMITH.

SMOKE OONSUMING APPARATU$ FOR LOCOMOTIVES. "No. 251,142. Patented Dec. 20,1881.

Fig.1.

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UNITED STATES PATENT OFFICE.

HOWARD M. SMITH, OFS'I. LOUIS, MISSOURT.

S MOKE-CONSUMING APPARATUS FOR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent No. 251,142, dated December 20, 1881. Application filed August 26, 1861. (No model.)

' accompanying drawings, making part of this specification.

My improvement consists, in the main, of fans each side of the smoke-box taking a part of the contents of said box and forcing the same through pipes into a receiver, from which it is carried by steam jets and discharged into the furnace through vertical passages in a bridge-wall extending upward from thegratebars.

In the drawings, Figure 1 is a side view of a locomotive, with parts in vertical section. Fig. 2 is a front view of locomotive, with parts invertical section. Fig. 3 is a detail section of one of the steam-jets. Fig. 4 is a front view of the reservoir or smoke-receiver with part broken out, showing one of the steam-jets. Fig. 5 is a transverse section at 5 5, Fig. 6, of the lower portion of the fire-box, with a front view of the bridge-wall, except that a part is in section, showing one of the smoke-passages. Fig. 6 is a top view of the bridge-wall. Fig. 7 is a section at 7 7, Fig. 5. Figs. 1 and 2 are on a smaller scale than the other figures.

A is the furnace, B the grate-bars, and O the closed bottom of thefurnace behind the bridge-wall D. The boiler E is of the ordinary construction, the fiuesdischarginginto a smoke chamber or box, F. The smoke-box has the usual inclined transverse deflecting plate or partition, G, extending from side to side and deflecting the smoke issuing from the flues downward to the lower part of the smoke-chambers, where it passes beneath the lower edge of the plate G.

H is a vertical division-plate, parallel to the sides of the smoke-box, and extending from the deflector-plate G to the end of the boiler, dividing the part of the smoke-ch amber between the deflector and the boiler into two equal compartments. The plate H extends preferably from the top of the plate G, where the latter o joins the boiler end, to the bottom of the smokechamber.

Upon each side of the smoke-box is a rotary fan, I, whose suction-orifice is in communication with the smoke-charm her in the part of said chamber between the deflector G and the end of the boiler, the division-plate H insuring that about an equal quantity of the contents of the smoke-chamber shall be withdrawn by each of the fans. The discharge-opening of each fan communicates with a pipe, J, extending to a transverse smoke receiver or reservoir beneath the boiler. From the receiver extend pipes L, leading below the furnace and ending in passages or flues (1, extending upward through thebridge-wall D and discharging at the top of the wall into the furnace A. The fans may be driven by any suitable means.

I have shownasteam-pipe, N, of which there is one for each fan.'1eadingfrom steam-pipeN to a steam-jet, N which latter acts on the buckets of a rotary piston-wheel attached to the fan-shaft, as shown and described in aformer application for patent, filed 5th August, 1881, and as the means of driving the fans form no part of the claim of this application, no detailed description of such means of driving would be in place here,not limiting myself to any particular means of driving the fans.

N are steam-pipes taking steam from the steam-drum and communicating with nozzles n, one for each of the pipes L. The nozzles n are arranged to act as injectors, to carry the contents of the reservoir K into the pipes L and force it along said pipes and the hot flues d into the furnace. The mingled steam and unconsumed carbon and carbonaceous gases from the smoke-chamber are heated to a high degree in passing through the hot flues d in the bridge-wall, and are discharged into the hottest part of the fire-chamber, where the combustible matter is consumed, increasing the heat of the chamber at this point.

0 is the stem of a valve in connection with the part N of steam-pipe N, which passes through the steam-drum. By means of this IOO 1. The combination of smoke chamber or box F, blower I, pipes J L, bridge-wall D, having flues d, and furnace A, as set forth.

2. The combination, with the smoke-box F and furnace A, of the fans I I, pipes J Jleading therefrom, pipes L L, and bridge-Wall D, having flues d, the said fans I I, pipes J J, and

pipes L L, respectively, being located and adapted to operate on each side of the engine, as set forth.

3. The steam-pipes N N, having nozzles an, and the reservoir K, in combination with pipe J, smoke-box F, pipes L, bridge-wall D, having flues d, and furnace A, as set forth.

4. The steam-pipes N n and NH and blowers I, in combination with pipes J and L, res- HOWARD M. SMITH.

Witnesses:

SAML. KNIGHT, GEO. H. KNIGHT. 

